43021243636225 has 6 divisors (see below), whose sum is σ = 53346342108950. Its totient is φ = 34416994908960.

The previous prime is 43021243636121. The next prime is 43021243636243. The reversal of 43021243636225 is 52263634212034.

It can be written as a sum of positive squares in 3 ways, for example, as 2410715811904 + 40610527824321 = 1552648^2 + 6372639^2 .

It is not a de Polignac number, because 43021243636225 - 2²⁹ = 43020706765313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 860424872700 + ... + 860424872749.

Almost surely, 2^{43021243636225} is an apocalyptic number.

It is an amenable number.

43021243636225 is a deficient number, since it is larger than the sum of its proper divisors (10325098472725).

43021243636225 is a wasteful number, since it uses less digits than its factorization.

43021243636225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720849745459 (or 1720849745454 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 43.

Adding to 43021243636225 its reverse (52263634212034), we get a palindrome (95284877848259).

The spelling of 43021243636225 in words is "forty-three trillion, twenty-one billion, two hundred forty-three million, six hundred thirty-six thousand, two hundred twenty-five".